CN112392786A - Pressure tracking type vehicle oil-gas suspension hydraulic system - Google Patents
Pressure tracking type vehicle oil-gas suspension hydraulic system Download PDFInfo
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- CN112392786A CN112392786A CN202011366810.0A CN202011366810A CN112392786A CN 112392786 A CN112392786 A CN 112392786A CN 202011366810 A CN202011366810 A CN 202011366810A CN 112392786 A CN112392786 A CN 112392786A
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- 239000000725 suspension Substances 0.000 title claims abstract description 59
- 239000003921 oil Substances 0.000 claims description 49
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/167—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load using pilot pressure to sense the demand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
本发明是一种压力跟踪式车辆油气悬架液压系统。它由功能部件⑴和控制部件⑵组成，左调速阀⑿和右调速阀⒀分别通过二位二通电磁阀⑼连接左悬架油缸⑶和右悬架油缸⑷；左压力跟随元件⒁、二位四通电磁阀⑼、左蓄能器⑸和左悬架油缸⑶组成左液压支路⑺；右压力跟随元件⒂、二位四通电磁阀⑽、右蓄能器⑹和右悬架油缸⑷组成右液压支路⑻；左液压支路⑺与右液压支路⑻分别形成两路压力差动回路；左悬架油缸⑶和右悬架油缸⑷分别采用双缸筒液压油缸；左压力跟随元件⒁和右压力跟随元件⒂分别采用直动式三通减压阀，根据压力跟踪要求，选用相应的直动式三通减压阀弹簧腔的压力目标值。本发明具有结构简单、操作方便、控制精度较高和运行故障率低的优点。
The invention is a pressure tracking type vehicle oil and gas suspension hydraulic system. It consists of functional parts (1) and control parts (2), the left speed control valve (14) and the right speed control valve (11) are respectively connected to the left suspension oil cylinder (3) and the right suspension oil cylinder (4) through the two-position two-way solenoid valve (10); the left pressure follower element (11), Two-position four-way solenoid valve ⑼, left accumulator ⑸ and left suspension cylinder ⑶ form a left hydraulic branch ⑺; right pressure follower element⒂, two-position four-way solenoid valve⑽, right accumulator⑹ and right suspension cylinder ⑷ constitutes the right hydraulic branch ⑻; the left hydraulic branch ⑺ and the right hydraulic branch ⑻ respectively form two pressure differential circuits; the left suspension oil cylinder ⑶ and the right suspension oil cylinder ⑷ use double-cylinder hydraulic cylinders respectively; the left pressure follows Element ⒁ and right pressure follower element ⒂ use direct-acting three-way pressure reducing valves respectively. According to the pressure tracking requirements, select the corresponding pressure target value of the spring chamber of the direct-acting three-way pressure reducing valve. The invention has the advantages of simple structure, convenient operation, high control precision and low operation failure rate.
Description
Technical Field
The invention relates to a hydraulic control mechanism of a wheeled vehicle, in particular to a pressure tracking type hydraulic system of an oil-gas suspension of the vehicle.
Background
Chinese patent application publication CN106567904A proposes a liftable hydro-pneumatic suspension hydraulic system, which adopts the mode of setting a rigid stop valve between a hydro-pneumatic spring and an energy accumulator, and solves the lifting synchronism of the hydro-pneumatic suspension, and the defects are as follows: the synchronization of posture adjustment is poor, and the shaking in the lifting process is obvious.
In the prior art, a pressure sensor is usually arranged on an elastic element of a hydraulic system, and an electro-hydraulic control system is used for controlling the elastic element to realize impact-free switching between the elastic element and an actuator. The defects are as follows: the number of control elements is large, the manufacturing cost is high, the working condition adaptation is poor, and the reliability is insufficient.
Disclosure of Invention
The invention aims to provide a pressure tracking type hydraulic system of an oil-gas suspension of a vehicle, which can effectively improve the synchronism of posture adjustment of the hydraulic system and reliably realize the balance switching of the rigid-flexible state of the oil-gas suspension.
The technical scheme of the invention is as follows: the hydraulic system of the pressure tracking type vehicle oil-gas suspension is designed and consists of a functional component and a control component which are connected with each other, wherein the functional component is provided with a left suspension oil cylinder, a right suspension oil cylinder, a left energy accumulator, a right energy accumulator, a left hydraulic branch and a right hydraulic branch; the control part is provided with a two-position two-way electromagnetic valve, a two-position four-way electromagnetic valve, a pressure sensor, a left speed regulating valve, a right speed regulating valve, a left pressure following element and a right pressure following element.
The left speed regulating valve and the right speed regulating valve are respectively connected with a left suspension oil cylinder and a right suspension oil cylinder through a two-position two-way electromagnetic valve, a left pressure following element is connected with an oil inlet of the two-position four-way electromagnetic valve, the oil outlet of the two-position four-way electromagnetic valve is respectively connected with a left energy accumulator and the left suspension oil cylinder, and the left pressure following element, the two-position four-way electromagnetic valve, the left energy accumulator and the left suspension oil cylinder form a left hydraulic branch; the right pressure following element is connected with an oil inlet of the two-position four-way solenoid valve, an oil outlet of the two-position four-way solenoid valve is respectively connected with the right energy accumulator and the right suspension oil cylinder, and the right pressure following element, the two-position four-way solenoid valve, the right energy accumulator and the right suspension oil cylinder form a right hydraulic branch; the left hydraulic branch and the right hydraulic branch form two pressure differential loops respectively.
The left suspension oil cylinder and the right suspension oil cylinder respectively adopt double-cylinder hydraulic oil cylinders; the left pressure following element and the right pressure following element respectively adopt a direct-acting three-way pressure reducing valve, and the pressure target value of a spring cavity of the corresponding direct-acting three-way pressure reducing valve is selected according to the pressure tracking requirement.
The beneficial technical effects of the invention are as follows: because the left speed regulating valve and the right speed regulating valve are respectively connected with the left suspension oil cylinder and the right suspension oil cylinder through the two-position two-way electromagnetic valve, the load-resisting rigidity of the suspension system in the lifting process is improved, impact-free switching between the rigidity and the flexible state of the system is realized, and the synchronous lifting of the suspension system is realized. Meanwhile, because the left hydraulic branch and the right hydraulic branch are adopted, and the left suspension oil cylinder and the right suspension oil cylinder respectively adopt the double-cylinder hydraulic oil cylinder, a reliable pressure differential circuit is formed, the fluctuation of hydraulic load is avoided, and the posture adjustment of the oil-gas suspension is facilitated. In addition, the left hydraulic branch and the right hydraulic branch are respectively provided with the left pressure following element and the right pressure following element, so that the pressure balance between the elastic element and the actuator is facilitated, and the impact and the shake caused by hydraulic load are avoided. The invention also has the advantages of simple structure, convenient operation, higher control precision and low operation failure rate.
Drawings
Fig. 1 is a schematic structural view. In the figure, 1, a functional component, 2, a control component, 3, a left suspension oil cylinder, 4, a right suspension oil cylinder, 5, a left energy accumulator, 6, a right energy accumulator, 7, a left hydraulic branch, 8, a right hydraulic branch, 9, a two-position two-way electromagnetic valve, 10, a two-position four-way electromagnetic valve, 11, a pressure sensor, 12, a left speed regulating valve, 13, a right speed regulating valve, 14, a left pressure following element, 15 and a right pressure following element.
Detailed Description
The invention is further illustrated by the examples provided in the figures.
A first portion, a structural member.
The embodiment comprises the following steps: a function section 1, a control section 2;
the functional part 1 includes: a left suspension oil cylinder 3, a right suspension oil cylinder 4, a left energy accumulator 5 and a right energy accumulator 6; a left hydraulic branch 7 and a right hydraulic branch 8;
the control section 2 includes: the pressure control device comprises a two-position two-way electromagnetic valve 9, a two-position four-way electromagnetic valve 10, a pressure sensor 11, a left speed regulating valve 12, a right speed regulating valve 13, a left pressure following element 14 and a right pressure following element 15.
And a second part, controlling the process.
When the whole vehicle rises from the lowest end, hydraulic oil supplies oil to the rodless cavities of the left suspension oil cylinder 3 and the right suspension oil cylinder 4 through the right hydraulic branch 8, the two-position two-way electromagnetic valve 9 and the two-position four-way electromagnetic valve 10 are electrified at the moment, high-pressure oil pushes the left suspension oil cylinder 3 and the right suspension oil cylinder 4 to rise, and synchronous rising can be realized due to the fact that the left energy accumulator 5 and the right energy accumulator 6 are cut off at the moment and the flow control of the left speed regulating valve 12 and the right speed regulating valve 13 is achieved.
When the left suspension oil cylinder 3 and the right suspension oil cylinder 4 are lifted to the right, the two-position two-way electromagnetic valve 9 and the two-position four-way electromagnetic valve 10 are powered off, the high-pressure oil ports are closed, the left energy accumulator 5 and the right energy accumulator 6 are connected into the system and are converted into a flexible state, the pressure in the left energy accumulator 5 and the pressure in the right energy accumulator 6 always track the pressure in the left suspension oil cylinder 3 and the right suspension oil cylinder 4 under the action of the left pressure following element 14 and the right pressure following element 15, and the stability of the switching process is not influenced even if the pressure in the left suspension oil cylinder 3 and the. The shock-free switching between the rigid state and the soft state is realized, and the stability of the suspension cylinder without shaking is kept.
When the whole vehicle descends from the top, hydraulic oil provides oil for the rod cavities of the left suspension oil cylinder 3 and the right suspension oil cylinder 4 through the left hydraulic branch 7, the two-position two-way electromagnetic valve 9 and the two-position four-way electromagnetic valve 10 are electrified, high-pressure oil pushes the left suspension oil cylinder 3 and the right suspension oil cylinder 4 to descend, and synchronous descending can be achieved due to the fact that the left energy accumulator 5 and the right energy accumulator 6 are cut off at the moment and the flow control of the left speed regulating valve 12 and the right speed regulating valve 13 is achieved.
When the system descends to the right position, the system stops working, and the initial ground clearance of the carriage can be effectively controlled and adjusted due to the action of locking the two-position two-way electromagnetic valve 9, so that the application range and the operation safety of the system are expanded.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011366810.0A CN112392786A (en) | 2020-11-30 | 2020-11-30 | Pressure tracking type vehicle oil-gas suspension hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011366810.0A CN112392786A (en) | 2020-11-30 | 2020-11-30 | Pressure tracking type vehicle oil-gas suspension hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN112392786A true CN112392786A (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011366810.0A Pending CN112392786A (en) | 2020-11-30 | 2020-11-30 | Pressure tracking type vehicle oil-gas suspension hydraulic system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450599A (en) * | 2009-01-09 | 2009-06-10 | 长沙中联重工科技发展股份有限公司 | In-phase lifting device of wheeled vehicle oil-gas suspension |
| CN204739017U (en) * | 2015-04-08 | 2015-11-04 | 吉林工商学院 | Car lifts quick -witted hydraulic circuit |
| CN209195856U (en) * | 2018-11-26 | 2019-08-02 | 深圳市科斯腾液压设备有限公司 | A kind of servo-control system of press machine |
| CN211366884U (en) * | 2019-12-31 | 2020-08-28 | 湖南星邦智能装备股份有限公司 | Cantilever crane type aerial work platform and cantilever crane telescopic hydraulic system thereof |
| CN213744208U (en) * | 2020-11-30 | 2021-07-20 | 湖北江山专用汽车有限公司 | Pressure tracking type vehicle oil-gas suspension hydraulic system |
-
2020
- 2020-11-30 CN CN202011366810.0A patent/CN112392786A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450599A (en) * | 2009-01-09 | 2009-06-10 | 长沙中联重工科技发展股份有限公司 | In-phase lifting device of wheeled vehicle oil-gas suspension |
| CN204739017U (en) * | 2015-04-08 | 2015-11-04 | 吉林工商学院 | Car lifts quick -witted hydraulic circuit |
| CN209195856U (en) * | 2018-11-26 | 2019-08-02 | 深圳市科斯腾液压设备有限公司 | A kind of servo-control system of press machine |
| CN211366884U (en) * | 2019-12-31 | 2020-08-28 | 湖南星邦智能装备股份有限公司 | Cantilever crane type aerial work platform and cantilever crane telescopic hydraulic system thereof |
| CN213744208U (en) * | 2020-11-30 | 2021-07-20 | 湖北江山专用汽车有限公司 | Pressure tracking type vehicle oil-gas suspension hydraulic system |
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